:root {
    --apple-blue: #007AFF;
    --apple-bg: #F5F5F7;
    --apple-card-bg: rgba(255, 255, 255, 0.72);
    --apple-sidebar-bg: rgba(30, 30, 30, 0.85);
    --apple-text: #1d1d1f;
    --apple-text-secondary: #86868b;
    --apple-border: rgba(0, 0, 0, 0.1);
    --apple-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
    --radius-large: 22px;
    --radius-medium: 12px;
    
    /* Paper Defaults */
    --p-accent: #007AFF;
    --p-color: #000000;
    --p-bg: #FFFFFF;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter", "Pretendard", "Noto Sans KR", sans-serif;
}

body {
    background-color: var(--apple-bg);
    color: var(--apple-text);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
    padding: 16px;
    gap: 16px;
}

/* Apple Sidebar */
.sidebar {
    width: 240px;
    background: var(--apple-sidebar-bg);
    backdrop-filter: blur(40px);
    border-radius: var(--radius-large);
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    color: white;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    z-index: 100;
}

.logo-section {
    padding: 0 10px 40px;
}

.logo-text h1 {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.logo-text span {
    font-size: 11px;
    opacity: 0.5;
    text-transform: uppercase;
}

.main-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-group-title {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin: 24px 0 8px 12px;
    opacity: 0.4;
    color: #fff;
}

.nav-btn, .action-btn {
    width: 100%;
    padding: 10px 14px;
    border: none;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    font-size: 13px;
    font-weight: 500;
}

.nav-btn {
    background: transparent;
    color: rgba(255, 255, 255, 0.7);
}

.nav-btn.active {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.action-btn {
    background: var(--apple-blue);
    color: white;
    margin-top: 6px;
}

.action-btn:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 20px rgba(0, 122, 255, 0.3);
}

.action-btn.secondary { background: rgba(255, 255, 255, 0.1); }
.action-btn.email { background: #34C759; }

.template-dropdown {
    width: 100%;
    padding: 10px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: white;
    font-size: 12px;
    outline: none;
}

.color-picker-container {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    margin-top: 4px;
}

#theme-color {
    width: 24px;
    height: 24px;
    border: none;
    background: none;
    cursor: pointer;
}

/* Main Content Surface */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.top-bar {
    height: 60px;
    background: var(--apple-card-bg);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-medium);
    border: 1px solid white;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    box-shadow: var(--apple-shadow);
}

.workspace {
    flex: 1;
    display: flex;
    gap: 16px;
    overflow: hidden;
}

.form-panel {
    width: 440px;
    background: var(--apple-card-bg);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-medium);
    border: 1px solid white;
    padding: 30px;
    overflow-y: auto;
    box-shadow: var(--apple-shadow);
}

.form-panel h2 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 24px;
    letter-spacing: -0.3px;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 30px;
}

.form-group label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    color: var(--apple-text-secondary);
    margin-bottom: 4px;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 10px 14px;
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 400;
    outline: none;
    transition: all 0.2s;
}

.form-group input:focus, .form-group textarea:focus {
    background: white;
    border-color: var(--apple-blue);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

.items-table-editor {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed;
}

.items-table-editor th, .items-table-editor td {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.btn-remove {
    width: 24px;
    height: 24px;
    background: #FF3B30;
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Preview Panel - THE STAGE */
.preview-panel {
    flex: 1;
    background: #EBEBEB;
    border-radius: var(--radius-medium);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    overflow: hidden;
    position: relative;
}

.preview-scroll {
    width: 100%;
    height: 100%;
    overflow: auto;
    display: flex;
    justify-content: center;
    padding: 20px;
}

/* Fixing the "Cut Off" by using flex and scaling */
/* Scaling quality fix */
#print-area {
    background: var(--p-bg);
    color: var(--p-color);
    width: 210mm;
    min-height: 297mm;
    padding: 60px;
    box-shadow: 0 40px 120px rgba(0,0,0,0.12);
    transform-origin: top center;
    margin-bottom: 40px;
    backface-visibility: hidden;
    will-change: transform;
}

.paper-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--p-color);
    padding-bottom: 20px;
    margin-bottom: 30px;
}

.paper-title { font-size: 36px; font-weight: 800; letter-spacing: 10px; }
.total-won { color: var(--p-accent); font-weight: 800; font-size: 28px; }

/* 20 Templates Design (Simplified for Maintenance) */
.paper.modern { --p-accent: var(--p-accent); }
.paper.formal { font-family: 'Noto Sans KR', serif; border: 4px double var(--p-color); }
.paper.minimal { border: none !important; padding: 60px; }
.paper.corporate { border: none; }
.paper.corporate .paper-header { background: var(--p-accent); color: white; padding: 30px; }
.paper.tech { --p-bg: #000; --p-color: var(--p-accent); }
.paper.luxury { --p-bg: #0c0c0c; --p-color: #d4af37; --p-accent: #d4af37; border: 8px solid #d4af37; }
.paper.industrial { border: 15px solid #333; }
.paper.creative { border-left: 60px solid var(--p-accent); }
.paper.royal { border-radius: 40px; border: 5px solid var(--p-accent); }
.paper.soft { border-radius: 40px; --p-bg: #fffafa; }
.paper.gradient .paper-header { background: linear-gradient(135deg, var(--p-accent), #000); color: white; border: none; }

/* Table Styles on Paper */
.paper table { 
    width: 100%; 
    border-collapse: collapse; 
    table-layout: fixed;
    word-break: break-all;
}
.paper th, .paper td { 
    border: 1px solid var(--p-color); 
    padding: 12px 8px; 
    text-align: center; 
    font-size: 13px; 
    line-height: 1.4;
}
.paper th { background: rgba(0, 0, 0, 0.02); font-weight: 700; }
.provider-table th { width: 80px; }

.total-display {
    border: 2px solid var(--p-color);
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 30px 0;
    font-size: 18px;
    font-weight: 700;
}

/* Animations */
@keyframes slideIn {
    from { opacity: 0; transform: translateY(20px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

#print-area { animation: slideIn 0.8s cubic-bezier(0.16, 1, 0.3, 1); }